grep: implement -m MAX_MATCHES; fix help text

grep_file                                            771     822     +51
packed_usage                                       22573   22610     +37
.rodata                                           128058  128090     +32
grep_main                                            842     853     +11
max_matches                                            -       4      +4
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(add/remove: 1/0 grow/shrink: 4/0 up/down: 135/0)             Total: 135 bytes

1 files changed, 3 insertions, 2 deletions

diff --git a/include/usage.h b/include/usage.h
index 68325046f..bd9cb9908 100644
--- a/include/usage.h
+++ b/include/usage.h
@@ -1164,14 +1164,15 @@
        "\n      -v      Select non-matching lines" \
        "\n      -s      Suppress file open/read error messages" \
        "\n      -c      Only print count of matching lines" \
-       "\n      -f      Read PATTERN from file" \
        "\n      -o      Show only the part of a line that matches PATTERN" \
+       "\n      -m MAX  Match up to MAX times per file" \
         USE_DESKTOP( \
        "\n      -w      Match whole words only") \
-       "\n      -e      PATTERN is a regular expression" \
        "\n      -F      PATTERN is a set of newline-separated strings" \
         USE_FEATURE_GREP_EGREP_ALIAS( \
        "\n      -E      PATTERN is an extended regular expression") \
+       "\n      -e PTRN Pattern to match" \
+       "\n      -f FILE Read pattern from file" \
         USE_FEATURE_GREP_CONTEXT( \
        "\n      -A      Print NUM lines of trailing context" \
        "\n      -B      Print NUM lines of leading context" \