Reworded path strings in Notes

doc/api/path.markdown

@@ -22,8 +22,8 @@ Example:
     // returns
     '/foo/bar/baz/asdf'
 
-*Note:* If the path is a zero-length string then the current working directory
-        will be returned.
+*Note:* If the path string passed as argument is a zero-length string then the
+        current working directory will be returned.
 
 ## path.join([path1][, path2][, ...])
 
@@ -42,8 +42,8 @@ Example:
     // throws exception
     TypeError: Arguments to path.join must be strings
 
-*Note:* If the joined path is a zero-length string then the current working
-        directory will be returned.
+*Note:* If the joined path string is a zero-length string then the current
+        working directory will be returned.
 
 ## path.resolve([from ...], to)
 
@@ -84,8 +84,8 @@ Examples:
     // if currently in /home/myself/iojs, it returns
     '/home/myself/iojs/wwwroot/static_files/gif/image.gif'
 
-*Note:* If the path is a zero-length string then the current working directory
-        will be used.
+*Note:* If the arguments to `resolve` are zero-length strings then the current
+        working directory will be used instead of them.
 
 ## path.isAbsolute(path)
 
@@ -106,7 +106,9 @@ Windows examples:
     path.isAbsolute('bar\\baz')  // false
     path.isAbsolute('.')         // false
 
-*Note:* If the path is a zero-length string then `false` will be returned.
+*Note:* If the path string passed as parameter is a zero-length string,
+        unlike other path module functions, zero-length string will be used
+        as-is and `false` will be returned.
 
 ## path.relative(from, to)
 
@@ -128,9 +130,9 @@ Examples:
     // returns
     '../../impl/bbb'
 
-*Note:* If any of the paths passed are zero-length strings then the current
-        working directory will be used instead. If both the paths are the same
-        then a zero-length string will be returned.
+*Note:* If the arguments to `relative` are zero-length strings then the current
+        working directory will be used instead of them. If both the paths are
+        the same then a zero-length string will be returned.
 
 ## path.dirname(p)