misc: rate_limiter: streamline error Display::fmt()

The changes were mostly automatically applied using the Python
script mentioned in the first commit of this series.

Signed-off-by: Philipp Schuster <philipp.schuster@cyberus-technology.de>
On-behalf-of: SAP philipp.schuster@sap.com

rate_limiter/src/group.rs

@@ -23,23 +23,23 @@ pub enum Error {
     ThreadSpawn(#[source] io::Error),
 
     /// Cannot create epoll context.
-    #[error("Error creating epoll context: {0}")]
+    #[error("Error creating epoll context")]
     Epoll(#[source] io::Error),
 
     /// Cannot create EventFd.
-    #[error("Error creating EventFd: {0}")]
+    #[error("Error creating EventFd")]
     EventFd(#[source] io::Error),
 
     /// Cannot create RateLimiter.
-    #[error("Error creating RateLimiter: {0}")]
+    #[error("Error creating RateLimiter")]
     RateLimiter(#[source] io::Error),
 
     /// Cannot read from EventFd.
-    #[error("Error reading from EventFd: {0}")]
+    #[error("Error reading from EventFd")]
     EventFdRead(#[source] io::Error),
 
     /// Cannot write to EventFd.
-    #[error("Error writing to EventFd: {0}")]
+    #[error("Error writing to EventFd")]
     EventFdWrite(#[source] io::Error),
 }
 

rate_limiter/src/lib.rs

@@ -65,7 +65,7 @@ pub enum Error {
     #[error("Event handler was called spuriously: {0}")]
     SpuriousRateLimiterEvent(&'static str),
     /// The event handler encounters while TimerFd::wait()
-    #[error("Failed to wait for the timer: {0}")]
+    #[error("Failed to wait for the timer")]
     TimerFdWaitError(#[source] std::io::Error),
 }