wc: split osx and common platform (#6834)

pages/common/wc.md

@@ -22,3 +22,7 @@
 - Use standard input to count lines, words and characters (bytes) in that order:
 
 `{{find .}} | wc`
+
+- Count the length of the longest line in number of characters:
+
+`wc --max-line-length {{file}}`

pages/osx/wc.md

@@ -0,0 +1,24 @@
+# wc
+
+> Count lines, words, or bytes.
+> More information: <https://www.gnu.org/software/coreutils/wc>.
+
+- Count lines in file:
+
+`wc -l {{file}}`
+
+- Count words in file:
+
+`wc -w {{file}}`
+
+- Count characters (bytes) in file:
+
+`wc -c {{file}}`
+
+- Count characters in file (taking multi-byte character sets into account):
+
+`wc -m {{file}}`
+
+- Use standard input to count lines, words and characters (bytes) in that order:
+
+`{{find .}} | wc`