message: now that the sgfs are big, its really helpful to make grep bail early when needed
diff: @@ -423,7 +423,7 @@ bashisms to run on them:
  * Find the proportion of games won by one color:
  ```
  - grep "B+" **/*.sgf | wc -l
  + grep -m 1 "B+" **/*.sgf | wc -l
  ```
  or e.g. "B+R", etc to search for how many by resign etc.
  @@ -434,12 +434,12 @@ bashisms to run on them:
  * Get output of the most frequent first moves
  ```
  - grep -oh '^;B\[[a-s]*\]' **/*.sgf | sort | uniq -c | sort -n
  + grep -oh -m 1 '^;B\[[a-s]*\]' **/*.sgf | sort | uniq -c | sort -n
  ```
  * Distribution of game-winning margin (ministat, again):
  ```
  - find . -name "*.sgf" -exec /bin/sh -c 'grep -o "W+[[:digit:]]*" < {} | cut -c3-'
  + find . -name "*.sgf" -exec /bin/sh -c 'grep -o -m 1 "W+[[:digit:]]*" < {} | cut -c3-'
  \; | ministat
  ```
  