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go/doc: allow interior dot in heading, as in "go.mod"

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Only the expected headings are affected.
Diffing the output of "go run headscan.go" before and after:

$ diff head1 head2
26a27,28
> 	Edit go.mod from tools or scripts
> 	Make go.mod semantically consistent
168c170
< 141 headings found
---
> 143 headings found
$

Fixes #26938.

Change-Id: I204fd982a60773aa26880cd19eed890c373b8ab6
Reviewed-on: https://go-review.googlesource.com/129677
Run-TryBot: Russ Cox <rsc@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Ian Lance Taylor <iant@golang.org>
This commit is contained in:
Russ Cox 2018-08-17 10:51:53 -04:00
parent 3e0f5f934e
commit c81d216d84
1 changed files with 13 additions and 1 deletions
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14
src/go/doc/comment.go
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@ -232,7 +232,7 @@ func heading(line string) string {
}
// exclude lines with illegal characters. we allow "(),"
if strings.ContainsAny(line, ".;:!?+*/=[]{}_^°&§~%#@<\">\\") {
if strings.ContainsAny(line, ";:!?+*/=[]{}_^°&§~%#@<\">\\") {
return ""
}
@ -248,6 +248,18 @@ func heading(line string) string {
b = b[i+2:]
}
// allow "." when followed by non-space
for b := line;; {
i := strings.IndexRune(b, '.')
if i < 0 {
break
}
if i+1 >= len(b) || b[i+1] == ' ' {
return "" // not followed by non-space
}
b = b[i+1:]
}
return line
}