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33 lines
901 B
33 lines
901 B
2 years ago
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diff --git a/src/help.c b/src/help.c
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index ee6ff18..67e4fb2 100644
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--- a/src/help.c
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+++ b/src/help.c
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@@ -422,8 +422,7 @@ find_help_tags(
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|| (vim_strchr((char_u *)"%_z@", arg[1]) != NULL
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&& arg[2] != NUL)))
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{
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- STRCPY(d, "/\\\\");
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- STRCPY(d + 3, arg + 1);
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+ vim_snprintf((char *)d, IOSIZE, "/\\\\%s", arg + 1);
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// Check for "/\\_$", should be "/\\_\$"
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if (d[3] == '_' && d[4] == '$')
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STRCPY(d + 4, "\\$");
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diff --git a/src/testdir/test_help.vim b/src/testdir/test_help.vim
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index ff2bc41..c8ff5b8 100644
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--- a/src/testdir/test_help.vim
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+++ b/src/testdir/test_help.vim
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@@ -123,5 +123,13 @@ func Test_helptag_cmd_readonly()
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call delete('Xdir', 'rf')
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endfunc
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+func Test_help_long_argument()
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+ try
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+ exe 'help \%' .. repeat('0', 1021)
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+ catch
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+ call assert_match("E149:", v:exception)
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+ endtry
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+endfunc
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+
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" vim: shiftwidth=2 sts=2 expandtab
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