Improve wording

Author: jserv

picosh/README.md

@@ -4,7 +4,7 @@ This is a tiny UNIX shell, implemented in C.
 
 The shell supports:
 * Simple commands, i.e. `vim`, `echo hello world` etc.
-* Pipelines, i.e. `ls | wc -l'.
+* Pipelines, i.e. `ls | wc -l`.
 * File redirection, i.e. `echo hello > x` and `cat < x | grep hello`.
 
 However, it does not support:
@@ -13,4 +13,4 @@ However, it does not support:
 * `&`, although that should be trivial to add.
 * Globs, variables, conditionals, loops, functions and it will never be a proper POSIX shell.
 
-Only a toy. Use and explore at your own risk. However, PRs are welcome for bugfixes, or if the additional functionality would not increase the complexity.
+Use and explore at your own risk.