textutil: add page (#2657)

* textutil: add page

pages/osx/textutil.md

@@ -0,0 +1,23 @@
+# textutil
+
+> Used to manipulate text files of various formats.
+
+- Display information about foo.rtf:
+
+`textutil -info {{foo.rtf}}`
+
+- Convert foo.rtf into foo.html:
+
+`textutil -convert {{html}} {{foo.rtf}}`
+
+- Convert rich text to normal text:
+
+`textutil {{foo.rtf}} -convert {{txt}}`
+
+- Convert foo.txt into foo.rtf, using Times 10 for the font:
+
+`textutil -convert {{rtf}} -font {{Times}} -fontsize {{10}} {{foo.txt}}`
+
+- Load all RTF files in the current directory, concatenates their contents, and writes the result out as index.html with the HTML title set to "Several Files":
+
+`textutil -cat {{html}} -title "Several Files" -output {{index.html}} *.rtf`