Add string 'repeat' subcommand

This feature add the ability to repeat a string a given number of times.
For example: string repeat -n 3 foo

tests/string.err

@@ -0,0 +1,7 @@
+string repeat: Invalid count value '-1'
+string repeat: Invalid max value '-1'
+string repeat: Argument 'notanumber' is not a number
+string repeat: Argument 'notanumber' is not a number
+string repeat: Too many arguments
+string repeat: Expected argument
+string repeat: Unknown option '-l'

tests/string.in

@@ -90,3 +90,46 @@ string match -r -v "[dcantg].*" dog can cat diz; or echo "no regexp invert match
 string match -v "???" dog can cat diz; or echo "no glob invert match"
 
 string match -rvn a bbb
+
+# test repeat subcommand
+string repeat -n 2 'foo'
+
+string repeat --count 2 'foo'
+
+echo foo | string repeat -n 2
+
+string repeat -n2 -q 'foo'; and echo "exit 0"
+
+string repeat -n2 --quiet 'foo'; and echo "exit 0"
+
+string repeat -n0 'foo'; or echo "exit 1"
+
+string repeat -n0; or echo "exit 1"
+
+string repeat -m0; or echo "exit 1"
+
+string repeat -n1 -N 'there is '; echo "no newline"
+
+string repeat -n1 --no-newline 'there is '; echo "no newline"
+
+string repeat -n10 -m4 'foo'
+
+string repeat -n10 --max 5 'foo'
+
+string repeat -n3 -m20 'foo'
+
+string repeat -m4 'foo'
+
+string repeat -n-1 'foo'; or echo "exit 2"
+
+string repeat -m-1 'foo'; or echo "exit 2"
+
+string repeat -n notanumber 'foo'; or echo "exit 2"
+
+string repeat -m notanumber 'foo'; or echo "exit 2"
+
+echo 'stdin' | string repeat -n1 'and arg'; or echo "exit 2"
+
+string repeat -n; or echo "exit 2"
+
+string repeat -l fakearg 2>&1 | head -n1 1>&2

tests/string.out

@@ -63,3 +63,23 @@ missing argument returns 0
 no regexp invert match
 no glob invert match
 1 3
+foofoo
+foofoo
+foofoo
+exit 0
+exit 0
+exit 1
+exit 1
+exit 1
+there is no newline
+there is no newline
+foof
+foofo
+foofoofoo
+foof
+exit 2
+exit 2
+exit 2
+exit 2
+exit 2
+exit 2