Clean up some weird command strings

src/librustdoc/lib.rs

@@ -165,9 +165,8 @@ fn opts() -> Vec<RustcOptGroup> {
             o.optmulti(
                 "",
                 "passes",
-                "list of passes to also run, you might want \
+                "list of passes to also run, you might want to pass it multiple times; a value of \
-                        to pass it multiple times; a value of `list` \
+                        `list` will print available passes",
-                        will print available passes",
                 "PASSES",
             )
         }),
@@ -276,8 +275,7 @@ fn opts() -> Vec<RustcOptGroup> {
             o.optflag(
                 "",
                 "sort-modules-by-appearance",
-                "sort modules by where they appear in the \
+                "sort modules by where they appear in the program, rather than alphabetically",
-                                                         program, rather than alphabetically",
             )
         }),
         stable("theme", |o| {