docs: documentation updates based on code review

Signed-off-by: Paul Osborne <[email protected]>

Author: posborne

README.md

@@ -15,7 +15,7 @@ cargo install gpio-utils
 
 ## Features
 
-- [ ] Infrastructure for providing names for the GPIOs in one systems providing
+- [ ] Infrastructure for providing names for the GPIOs in one's system providing
       names that map to individual pins.  These names (in addition to GPIO numbers)
       may be used with other commands.
 - [ ] Ability to export/unexport GPIOs and expose symlinks using the GPIO "friendly"
@@ -32,7 +32,7 @@ system:
 
 1. The `gpio` command.  This provides the core functionality for GPIO Utils and
    is useful in its own right.
-2. The `gpio` init script.  This init script can be integrated into a target
+2. The `gpio` init script/systemd service.  This can be integrated into a target
    system and will ensure that configured GPIOs get exported on system startup
    (The GPIO command searches for `/etc/gpio.toml` and `/etc/gpio.d/*.toml`
    configs)

src/main.rs

@@ -26,7 +26,7 @@ fn main() {
 
         // gpio poll
         .subcommand(SubCommand::with_name("poll")
-                    .about("Wait for an event to happen on an GPIO Input")
+                    .about("Wait for an event to happen on a GPIO Input")
                     .arg(Arg::with_name("pin")
                          .help("The pin name (or number)")
                          .index(1)
@@ -70,7 +70,7 @@ fn main() {
 
         // gpio status
         .subcommand(SubCommand::with_name("status")
-                    .about("Output status of all configured GPIOs")
+                    .about("Output status of a GPIO or all GPIOs if no pin is specified")
                     .arg(Arg::with_name("pin")
                          .help("The pin name (or number)")
                          .index(1)