Add some "horizontal rule" comment lines
diff --git a/example/crc32/crc32.cc b/example/crc32/crc32.cc
index e9e1796..5d63c99 100644
--- a/example/crc32/crc32.cc
+++ b/example/crc32/crc32.cc
@@ -12,6 +12,8 @@
// See the License for the specific language governing permissions and
// limitations under the License.
+// ----------------
+
/*
crc32 prints the CRC-32 checksum (using the IEEE polynomial) of stdin. It is
similar to the standard /usr/bin/crc32 program, except that this example
diff --git a/example/gifplayer/gifplayer.c b/example/gifplayer/gifplayer.c
index 42ab767..ed2fa02 100644
--- a/example/gifplayer/gifplayer.c
+++ b/example/gifplayer/gifplayer.c
@@ -12,6 +12,8 @@
// See the License for the specific language governing permissions and
// limitations under the License.
+// ----------------
+
/*
gifplayer prints an ASCII representation of the GIF image read from stdin. To
play Eadweard Muybridge's iconic galloping horse animation, run:
diff --git a/example/library/library.c b/example/library/library.c
index 29fbd26..cb32e49 100644
--- a/example/library/library.c
+++ b/example/library/library.c
@@ -12,6 +12,8 @@
// See the License for the specific language governing permissions and
// limitations under the License.
+// ----------------
+
/*
library exercises the software libraries built by `wuffs genlib`.
diff --git a/example/zcat/zcat.c b/example/zcat/zcat.c
index f8b01a3..2296b30 100644
--- a/example/zcat/zcat.c
+++ b/example/zcat/zcat.c
@@ -12,6 +12,8 @@
// See the License for the specific language governing permissions and
// limitations under the License.
+// ----------------
+
/*
zcat decodes gzip'ed data to stdout. It is similar to the standard /bin/zcat
program, except that this example program only reads from stdin. On Linux, it
diff --git a/fuzz/c/std/gif_fuzzer.c b/fuzz/c/std/gif_fuzzer.c
index e1e7adf..abb5cc0 100644
--- a/fuzz/c/std/gif_fuzzer.c
+++ b/fuzz/c/std/gif_fuzzer.c
@@ -12,6 +12,8 @@
// See the License for the specific language governing permissions and
// limitations under the License.
+// ----------------
+
// Silence the nested slash-star warning for the next comment's command line.
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wcomment"
diff --git a/fuzz/c/std/zlib_fuzzer.c b/fuzz/c/std/zlib_fuzzer.c
index 49f58a1..50bab3d 100644
--- a/fuzz/c/std/zlib_fuzzer.c
+++ b/fuzz/c/std/zlib_fuzzer.c
@@ -12,6 +12,8 @@
// See the License for the specific language governing permissions and
// limitations under the License.
+// ----------------
+
// Silence the nested slash-star warning for the next comment's command line.
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wcomment"
diff --git a/script/adler32-standalone.c b/script/adler32-standalone.c
index 712d8c9..29de1c0 100644
--- a/script/adler32-standalone.c
+++ b/script/adler32-standalone.c
@@ -12,6 +12,8 @@
// See the License for the specific language governing permissions and
// limitations under the License.
+// ----------------
+
// This file contains a hand-written C implementation of the Adler32 hash
// function, based on the code generated by the Wuffs std/zlib implementation.
// Its purpose is to benchmark different compilers, or different versions of
diff --git a/script/bench-c-deflate-fragmentation.c b/script/bench-c-deflate-fragmentation.c
index 99ab4da..94b400e 100644
--- a/script/bench-c-deflate-fragmentation.c
+++ b/script/bench-c-deflate-fragmentation.c
@@ -12,6 +12,8 @@
// See the License for the specific language governing permissions and
// limitations under the License.
+// ----------------
+
// This file contains a hand-written C benchmark of different strategies for
// decoding PNG data.
//
diff --git a/script/bench-rust-gif-dot-rs/src/main.rs b/script/bench-rust-gif-dot-rs/src/main.rs
index cb56c81..2eef3c1 100644
--- a/script/bench-rust-gif-dot-rs/src/main.rs
+++ b/script/bench-rust-gif-dot-rs/src/main.rs
@@ -12,6 +12,8 @@
// See the License for the specific language governing permissions and
// limitations under the License.
+// ----------------
+
// This program exercises the Rust GIF decoder at
// https://github.com/Geal/gif.rs
//
diff --git a/script/bench-rust-gif/src/main.rs b/script/bench-rust-gif/src/main.rs
index b49e4c0..ec6bfb2 100644
--- a/script/bench-rust-gif/src/main.rs
+++ b/script/bench-rust-gif/src/main.rs
@@ -12,6 +12,8 @@
// See the License for the specific language governing permissions and
// limitations under the License.
+// ----------------
+
// This program exercises the Rust GIF decoder at
// https://github.com/PistonDevelopers/image-gif
//
diff --git a/script/wuffs-deflate-decoder-decode-huffman.c b/script/wuffs-deflate-decoder-decode-huffman.c
index 7868a00..397376c 100644
--- a/script/wuffs-deflate-decoder-decode-huffman.c
+++ b/script/wuffs-deflate-decoder-decode-huffman.c
@@ -12,6 +12,8 @@
// See the License for the specific language governing permissions and
// limitations under the License.
+// ----------------
+
// This file contains a hand-written C implementation of
// release/c/wuffs-unsupported-snapshot.c's generated
// wuffs_deflate__decoder__decode_huffman_fast function.
@@ -23,9 +25,9 @@
// To repeat, substituting in this C implementation is NOT SAFE, and may result
// in buffer overflows. This code exists only to aid optimization of the (safe)
// std/deflate/*.wuffs code and the Wuffs compiler's code generation.
-//
+
// ----------------
-//
+
// Having said that, to generate the benchmark numbers with this hand-written C
// implementation, edit release/c/wuffs-unsupported-snapshot.c and find the
// lines that say
diff --git a/test/c/mimiclib/deflate-gzip-zlib.c b/test/c/mimiclib/deflate-gzip-zlib.c
index 635eb1e..6392bdf 100644
--- a/test/c/mimiclib/deflate-gzip-zlib.c
+++ b/test/c/mimiclib/deflate-gzip-zlib.c
@@ -12,6 +12,8 @@
// See the License for the specific language governing permissions and
// limitations under the License.
+// ----------------
+
// Uncomment this line to test and bench miniz instead of zlib-the-library.
// #define WUFFS_MIMICLIB_USE_MINIZ_INSTEAD_OF_ZLIB 1
diff --git a/test/c/std/adler32.c b/test/c/std/adler32.c
index 2b085b7..884a10a 100644
--- a/test/c/std/adler32.c
+++ b/test/c/std/adler32.c
@@ -12,6 +12,8 @@
// See the License for the specific language governing permissions and
// limitations under the License.
+// ----------------
+
/*
This test program is typically run indirectly, by the "wuffs test" or "wuffs
bench" commands. These commands take an optional "-mimic" flag to check that
diff --git a/test/c/std/crc32.c b/test/c/std/crc32.c
index 5ea1d3c..118de3b 100644
--- a/test/c/std/crc32.c
+++ b/test/c/std/crc32.c
@@ -12,6 +12,8 @@
// See the License for the specific language governing permissions and
// limitations under the License.
+// ----------------
+
/*
This test program is typically run indirectly, by the "wuffs test" or "wuffs
bench" commands. These commands take an optional "-mimic" flag to check that
diff --git a/test/c/std/deflate.c b/test/c/std/deflate.c
index 3f340c2..1c9de16 100644
--- a/test/c/std/deflate.c
+++ b/test/c/std/deflate.c
@@ -12,6 +12,8 @@
// See the License for the specific language governing permissions and
// limitations under the License.
+// ----------------
+
/*
This test program is typically run indirectly, by the "wuffs test" or "wuffs
bench" commands. These commands take an optional "-mimic" flag to check that
diff --git a/test/c/std/gif.c b/test/c/std/gif.c
index 6e04759..27d2699 100644
--- a/test/c/std/gif.c
+++ b/test/c/std/gif.c
@@ -12,6 +12,8 @@
// See the License for the specific language governing permissions and
// limitations under the License.
+// ----------------
+
/*
This test program is typically run indirectly, by the "wuffs test" or "wuffs
bench" commands. These commands take an optional "-mimic" flag to check that
diff --git a/test/c/std/gzip.c b/test/c/std/gzip.c
index 9dfbca7..43964cd 100644
--- a/test/c/std/gzip.c
+++ b/test/c/std/gzip.c
@@ -12,6 +12,8 @@
// See the License for the specific language governing permissions and
// limitations under the License.
+// ----------------
+
/*
This test program is typically run indirectly, by the "wuffs test" or "wuffs
bench" commands. These commands take an optional "-mimic" flag to check that
diff --git a/test/c/std/lzw.c b/test/c/std/lzw.c
index 9d18ffd..ad7c762 100644
--- a/test/c/std/lzw.c
+++ b/test/c/std/lzw.c
@@ -12,6 +12,8 @@
// See the License for the specific language governing permissions and
// limitations under the License.
+// ----------------
+
/*
This test program is typically run indirectly, by the "wuffs test" or "wuffs
bench" commands. These commands take an optional "-mimic" flag to check that
diff --git a/test/c/std/zlib.c b/test/c/std/zlib.c
index 252a4fe..93cc833 100644
--- a/test/c/std/zlib.c
+++ b/test/c/std/zlib.c
@@ -12,6 +12,8 @@
// See the License for the specific language governing permissions and
// limitations under the License.
+// ----------------
+
/*
This test program is typically run indirectly, by the "wuffs test" or "wuffs
bench" commands. These commands take an optional "-mimic" flag to check that
