Add cargo completion

clean_files.txt

@@ -30,5 +30,6 @@ themes/powerline
 
 # completions
 #
-completion/available/rustup.completion.bash
+completion/available/cargo.completion.bash
 completion/available/pipx.completion.bash
+completion/available/rustup.completion.bash

completion/available/cargo.completion.bash

@@ -0,0 +1,7 @@
+#!/usr/bin/env bash
+
+# cargo (Rust package manager) completion
+
+if _binary_exists rustup && _binary_exists cargo; then
+	eval "$(rustup completions bash cargo)"
+fi