Add proper help line for inline threshold

Also remove a period on a different help line for consistency

Author: oyvindln

src/librustc/session/config.rs

@@ -905,7 +905,7 @@ options! {CodegenOptions, CodegenSetter, basic_codegen_options,
     debug_assertions: Option<bool> = (None, parse_opt_bool, [TRACKED],
         "explicitly enable the cfg(debug_assertions) directive"),
     inline_threshold: Option<usize> = (None, parse_opt_uint, [TRACKED],
-        "set the inlining threshold for"),
+        "set the threshold for inlining a function (default: 225)"),
     panic: Option<PanicStrategy> = (None, parse_panic_strategy,
         [TRACKED], "panic strategy to compile crate with"),
 }
@@ -1052,7 +1052,7 @@ options! {DebuggingOptions, DebuggingSetter, basic_debugging_options,
     linker_flavor: Option<LinkerFlavor> = (None, parse_linker_flavor, [UNTRACKED],
                                            "Linker flavor"),
     fuel: Option<(String, u64)> = (None, parse_optimization_fuel, [TRACKED],
-        "Set the optimization fuel quota for a crate."),
+        "Set the optimization fuel quota for a crate"),
     print_fuel: Option<String> = (None, parse_opt_string, [TRACKED],
         "Make Rustc print the total optimization fuel used by a crate."),
     remap_path_prefix_from: Vec<String> = (vec![], parse_string_push, [TRACKED],