Fix POSIX PATH checks in bash profiles

Author: Braden1996

dot_bashrc

@@ -1,5 +1,8 @@
-if [ -d "$HOME/.local/bin" ] && [ ":$PATH:" != *":$HOME/.local/bin:"* ]; then
-  export PATH="$HOME/.local/bin:$PATH"
+if [ -d "$HOME/.local/bin" ]; then
+  case ":$PATH:" in
+    *":$HOME/.local/bin:"*) ;;
+    *) export PATH="$HOME/.local/bin:$PATH" ;;
+  esac
 fi
 
 # Bun

dot_profile

@@ -1,4 +1,7 @@
-if [ -d "$HOME/.local/bin" ] && [ ":$PATH:" != *":$HOME/.local/bin:"* ]; then
-  export PATH="$HOME/.local/bin:$PATH"
+if [ -d "$HOME/.local/bin" ]; then
+  case ":$PATH:" in
+    *":$HOME/.local/bin:"*) ;;
+    *) export PATH="$HOME/.local/bin:$PATH" ;;
+  esac
 fi
 . "$HOME/.cargo/env"