Capitalize error Display

src/error.rs

@@ -71,7 +71,7 @@ pub enum Error {
     #[error("HTTP format error: {0}")]
     HttpFormat(#[from] http::Error),
     /// Error from `permessage-deflate` extension.
-    #[error("deflate error: {0}")]
+    #[error("Deflate error: {0}")]
     Deflate(#[from] extensions::DeflateError),
 }
 

src/extensions/compression/deflate.rs

@@ -21,10 +21,10 @@ const TRAILER: [u8; 4] = [0x00, 0x00, 0xff, 0xff];
 #[derive(Debug, Error)]
 pub enum DeflateError {
     /// Compress failed
-    #[error("failed to compress: {0}")]
+    #[error("Failed to compress: {0}")]
     Compress(std::io::Error),
     /// Decompress failed
-    #[error("failed to decompress: {0}")]
+    #[error("Failed to decompress: {0}")]
     Decompress(std::io::Error),
 }