Merge pull request #5949 from tertsdiepraam/command-descriptions

`seq`: fix about text not found

src/uu/seq/seq.md

@@ -1,9 +1,9 @@
 # seq
 
-Display numbers from FIRST to LAST, in steps of INCREMENT.
-
 ```
 seq [OPTION]... LAST
 seq [OPTION]... FIRST LAST
 seq [OPTION]... FIRST INCREMENT LAST
 ```
+
+Display numbers from FIRST to LAST, in steps of INCREMENT.

src/uucore_procs/src/lib.rs

@@ -63,6 +63,9 @@ pub fn help_about(input: TokenStream) -> TokenStream {
     let input: Vec<TokenTree> = input.into_iter().collect();
     let filename = get_argument(&input, 0, "filename");
     let text: String = uuhelp_parser::parse_about(&read_help(&filename));
+    if text.is_empty() {
+        panic!("About text not found! Make sure the markdown format is correct");
+    }
     TokenTree::Literal(Literal::string(&text)).into()
 }
 
@@ -77,6 +80,9 @@ pub fn help_usage(input: TokenStream) -> TokenStream {
     let input: Vec<TokenTree> = input.into_iter().collect();
     let filename = get_argument(&input, 0, "filename");
     let text: String = uuhelp_parser::parse_usage(&read_help(&filename));
+    if text.is_empty() {
+        panic!("Usage text not found! Make sure the markdown format is correct");
+    }
     TokenTree::Literal(Literal::string(&text)).into()
 }