remove CR/LF from .gitignore

For everyone cursed by dos/windows line endings (aka CRLF):

The code reading the .gitignore files (excludes and excludes per
directory) leaves \r in the patterns, which causes fnmatch to fail for
no obvious reason. Just remove a "\r" preceding a "\n"
unconditionally.

Signed-off-by: Junio C Hamano <junkio@cox.net>

ls-files.c

@@ -97,7 +97,7 @@ static int add_excludes_from_file_1(const char *fname,
 	for (i = 0; i < size; i++) {
 		if (buf[i] == '\n') {
 			if (entry != buf + i && entry[0] != '#') {
-				buf[i] = 0;
+				buf[i - (i && buf[i-1] == '\r')] = 0;
 				add_exclude(entry, base, baselen, which);
 			}
 			entry = buf + i + 1;

t/t3001-ls-files-others-exclude.sh

@@ -67,4 +67,16 @@ test_expect_success \
        >output &&
      diff -u expect output'
 
+# Test \r\n (MSDOS-like systems)
+echo -ne '*.1\r\n/*.3\r\n!*.6\r\n' >.gitignore
+
+test_expect_success \
+    'git-ls-files --others with \r\n line endings.' \
+    'git-ls-files --others \
+       --exclude=\*.6 \
+       --exclude-per-directory=.gitignore \
+       --exclude-from=.git/ignore \
+       >output &&
+     diff -u expect output'
+
 test_done