Fix typos “an”→“a” and a few different ones that appeared in the same search

src/macros.rs

@@ -401,7 +401,7 @@ fn rewrite_macro_inner(
                 handle_vec_semi(context, shape, arg_vec, macro_name, style)
             } else {
                 // If we are rewriting `vec!` macro or other special macros,
-                // then we can rewrite this as an usual array literal.
+                // then we can rewrite this as a usual array literal.
                 // Otherwise, we must preserve the original existence of trailing comma.
                 let macro_name = &macro_name.as_str();
                 let mut force_trailing_comma = if trailing_comma {

src/string.rs

@@ -153,7 +153,7 @@ pub(crate) fn rewrite_string<'a>(
     wrap_str(result, fmt.config.max_width(), fmt.shape)
 }
 
-/// Returns the index to the end of the URL if the split at index of the given string includes an
+/// Returns the index to the end of the URL if the split at index of the given string includes a
 /// URL or alike. Otherwise, returns `None`.
 fn detect_url(s: &[&str], index: usize) -> Option<usize> {
     let start = match s[..=index].iter().rposition(|g| is_whitespace(g)) {

tests/source/cfg_if/detect/arch/x86.rs

@@ -2,7 +2,7 @@
 //!
 //! The features are detected using the `detect_features` function below.
 //! This function uses the CPUID instruction to read the feature flags from the
-//! CPU and encodes them in an `usize` where each bit position represents
+//! CPU and encodes them in a `usize` where each bit position represents
 //! whether a feature is available (bit is set) or unavaiable (bit is cleared).
 //!
 //! The enum `Feature` is used to map bit positions to feature names, and the

tests/target/cfg_if/detect/arch/x86.rs

@@ -2,7 +2,7 @@
 //!
 //! The features are detected using the `detect_features` function below.
 //! This function uses the CPUID instruction to read the feature flags from the
-//! CPU and encodes them in an `usize` where each bit position represents
+//! CPU and encodes them in a `usize` where each bit position represents
 //! whether a feature is available (bit is set) or unavaiable (bit is cleared).
 //!
 //! The enum `Feature` is used to map bit positions to feature names, and the