Add doc for wc(1)

osx/wc.md

@@ -0,0 +1,16 @@
+# wc
+
+> Count words, bytes, or lines
+
+- count lines in file
+
+`wc -l {{file}}`
+
+- count bytes in file
+
+`wc -c {{file}}`
+
+- count characters in file (taking multi-byte character sets into account)
+
+`wc -m {{file}}`
+