Fix GNU Grep 3.8 warnings [v9_18]
GNU Grep 3.8 reports several instances of stray backslashes in matching patterns:
grep: warning: stray \ before /
grep: warning: stray \ before :(cherry picked from commit 65e91ef5)
Edited by Ondřej Surý
GNU Grep 3.8 reports several instances of stray backslashes in matching patterns:
grep: warning: stray \ before /
grep: warning: stray \ before :(cherry picked from commit 65e91ef5)