cpio: Re-modify descriptions to match flags

- Also fixed a minor grammar error

pages/common/cpio.md

@@ -1,16 +1,16 @@
 # cpio
 
 > Copies files in and out of archives.
-> Supports following archive formats: binary, old ASCII, new ASCII, crc, HPUX binary, HPUX old ASCII, old tar, and POSIX.1 tar.
+> Supports the following archive formats: custom binary, old ASCII, new ASCII, crc, HPUX binary, HPUX old ASCII, old tar, and POSIX.1 tar.
 
-- Take a list of file names from standard input and copy them [o]ut to an archive in binary format:
+- Take a list of file names from standard input and add them [o]nto an archive in binary format:
 
 `echo "{{file1}} {{file2}} {{file3}}" | cpio -o > {{archive.cpio}}`
 
-- Copy [o]ut all files and folders in a directory to an archive, in [v]erbose mode:
+- Copy all files and folders in a directory and add them [o]nto an archive, in [v]erbose mode:
 
 `find {{path/to/directory}} | cpio -ov > {{archive.cpio}}`
 
-- Copy [i]n all files from an archive, generating [d]irectories where needed, in [v]erbose mode:
+- P[i]ck all files from an archive, generating [d]irectories where needed, in [v]erbose mode:
 
 `cpio -idv < {{archive.cpio}}`