i#7996 doxygen: Escape quote characters

Escapes quote characters in three places in doxygen comments to avoid
errors from doxygen 1.15.

1.15 errors from different reasons still exist, but this is progress.

Issue: #7996

Author: derekbruening

core/lib/dr_config.h

@@ -1,5 +1,5 @@
 /* **********************************************************
- * Copyright (c) 2011-2025 Google, Inc.  All rights reserved.
+ * Copyright (c) 2011-2026 Google, Inc.  All rights reserved.
  * Copyright (c) 2008-2010 VMware, Inc.  All rights reserved.
  * **********************************************************/
 
@@ -188,7 +188,7 @@ typedef struct _dr_config_client_t {
      * A NULL-terminated string specifying the full path to a valid client library.
      * The string length cannot exceed #MAXIMUM_PATH.  The client path may not
      * include any semicolons and when combined with \p client_options may not
-     * include all three quote characters (', ", `) simultaneously.
+     * include all three quote characters (\', \", \`) simultaneously.
      *
      * When querying via dr_get_client_info_ex() or dr_client_iterator_next_ex(), the
      * caller must either set this to NULL if that data is not needed or point at a
@@ -200,7 +200,7 @@ typedef struct _dr_config_client_t {
      * as arguments of dr_client_main() or via dr_get_option_array().  The string
      * length cannot exceed #DR_MAX_OPTIONS_LENGTH.  The client options may not
      * include any semicolons and when combined with \p client_path may not include
-     * all three quote characters (', ", `) simultaneously.
+     * all three quote characters (\', \", \`) simultaneously.
      *
      * When querying via dr_get_client_info_ex() or dr_client_iterator_next_ex(), the
      * caller must either set this to NULL if that data is not needed or point at a

core/lib/dr_inject.h

@@ -1,5 +1,5 @@
 /* **********************************************************
- * Copyright (c) 2013-2025 Google, Inc.  All rights reserved.
+ * Copyright (c) 2013-2026 Google, Inc.  All rights reserved.
  * Copyright (c) 2010 VMware, Inc.  All rights reserved.
  * **********************************************************/
 
@@ -114,7 +114,7 @@ DR_EXPORT
  *                             this process.
  * \param[out]  app_name       Pointer to the name of the target process.
  *                             Only valid until dr_inject_process_exit.
- * \return  Returns 0 on success.  On failure, returns a system error code.`
+ * \return  Returns 0 on success.  On failure, returns a system error code.
  */
 int
 dr_inject_process_attach(process_id_t pid, void **data, char **app_name);

core/lib/dr_tools.h

@@ -1,5 +1,5 @@
 /* **********************************************************
- * Copyright (c) 2010-2025, Inc.  All rights reserved.
+ * Copyright (c) 2010-2026, Inc.  All rights reserved.
  * Copyright (c) 2002-2010 VMware, Inc.  All rights reserved.
  * **********************************************************/
 
@@ -1939,7 +1939,7 @@ DR_API
  * continues (including across whitespace) until the matching end
  * quote is found.  Characters considered whitespace are ' ', '\\t',
  * '\\r', and '\\n'; characters considered quotes are '\\'', '\\"', and
- * '`'.
+ * '\`'.
  *
  * @param[in]  str     The start of the string containing the next token.
  * @param[out] buf     A buffer to store a null-terminated copy of the next token.