Fix doc

Signed-off-by: Jiahao XU <[email protected]>

src/lib.rs

@@ -965,31 +965,22 @@ impl Build {
         self
     }
 
-    /// Force the C++ compiler to use the specified standard library.
-    ///
-    /// Setting this option will automatically set `cpp_link_stdlib` to the same
-    /// value.
-    ///
-    /// The default value of this option is always `None`.
-    ///
-    /// This option has no effect when compiling for a Visual Studio based
-    /// target.
+    /// Set the standard library to link against when compiling with C++
+    /// support.
     ///
-    /// This option sets the `-stdlib` flag, which is only supported by some
-    /// compilers (clang, icc) but not by others (gcc). The library will not
-    /// detect which compiler is used, as such it is the responsibility of the
-    /// caller to ensure that this option is only used in conjunction with a
-    /// compiler which supports the `-stdlib` flag.
+    /// If the `CXXSTDLIB` environment variable is set, its value will
+    /// override the default value, but not the value explicitly set by calling
+    /// this function.
     ///
-    /// A value of `None` indicates that no specific C++ standard library should
-    /// be used, otherwise `-stdlib` is added to the compile invocation.
+    /// A value of `None` indicates that no automatic linking should happen,
+    /// otherwise cargo will link against the specified library.
     ///
     /// The given library name must not contain the `lib` prefix.
     ///
     /// Common values:
     /// - `stdc++` for GNU
     /// - `c++` for Clang
-    ///
+    /// - `c++_shared` or `c++_static` for Android
     ///
     /// # Example
     ///
@@ -1008,22 +999,30 @@ impl Build {
         self
     }
 
-    /// Set the standard library to link against when compiling with C++
-    /// support.
+    /// Force the C++ compiler to use the specified standard library.
     ///
-    /// If the `CXXSTDLIB` environment variable is set, its value will
-    /// override the default value, but not the value explicitly set by calling
-    /// this function.
+    /// Setting this option will automatically set `cpp_link_stdlib` to the same
+    /// value.
     ///
-    /// A value of `None` indicates that no automatic linking should happen,
-    /// otherwise cargo will link against the specified library.
+    /// The default value of this option is always `None`.
+    ///
+    /// This option has no effect when compiling for a Visual Studio based
+    /// target.
+    ///
+    /// This option sets the `-stdlib` flag, which is only supported by some
+    /// compilers (clang, icc) but not by others (gcc). The library will not
+    /// detect which compiler is used, as such it is the responsibility of the
+    /// caller to ensure that this option is only used in conjunction with a
+    /// compiler which supports the `-stdlib` flag.
+    ///
+    /// A value of `None` indicates that no specific C++ standard library should
+    /// be used, otherwise `-stdlib` is added to the compile invocation.
     ///
     /// The given library name must not contain the `lib` prefix.
     ///
     /// Common values:
     /// - `stdc++` for GNU
     /// - `c++` for Clang
-    /// - `c++_shared` or `c++_static` for Android
     ///
     /// # Example
     ///