fix backslash inserted in links upon edit (#2246)

* fix backslash appear in url with inline markdown sequences

* fix markdown chars not escaping on edit

src/app/plugins/markdown/inline/rules.ts

@@ -112,6 +112,7 @@ export const LinkRule: InlineMDRule = {
 };
 
 export const INLINE_SEQUENCE_SET = '[*_~`|]';
+export const CAP_INLINE_SEQ = `${URL_NEG_LB}${INLINE_SEQUENCE_SET}`;
 const ESC_SEQ_1 = `\\\\(${INLINE_SEQUENCE_SET})`;
 const ESC_REG_1 = new RegExp(`${URL_NEG_LB}${ESC_SEQ_1}`);
 export const EscapeRule: InlineMDRule = {