Update writingrules.rst

docs/writingrules.rst

@@ -70,7 +70,7 @@ Rules are generally composed of two sections: strings definition and condition.
 The strings definition section can be omitted if the rule doesn't rely on any
 string, but the condition section is always required. The strings definition
 section is where the strings that will be part of the rule are defined. Each
-string has an identifier consisting in a $ character followed by a sequence of
+string has an identifier consisting of a $ character followed by a sequence of
 alphanumeric characters and underscores, these identifiers can be used in the
 condition section to refer to the corresponding string. Strings can be defined
 in text or hexadecimal form, as shown in the following example::
@@ -94,7 +94,7 @@ The condition section is where the logic of the rule resides. This section must
 contain a boolean expression telling under which circumstances a file or process
 satisfies the rule or not. Generally, the condition will refer to previously
 defined strings by using their identifiers. In this context the string
-identifier acts as a boolean variable which evaluate to true of the string was
+identifier acts as a boolean variable which evaluate to true if the string was
 found in the file or process memory, or false if otherwise.
 
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