Merge pull #922: DevDocs: update a mis-directed link and clarify SIGHASH_SINGLE definitions

_data/glossary/en/sighash-anyonecanpay.yaml

@@ -7,8 +7,7 @@ required:
     title_max_40_characters_no_formatting: SIGHASH_ANYONECANPAY
 
     summary_max_255_characters_no_formatting: >
-        A signature hash type which modifies the behavior of other signature hash types
-        to allow signing only the current input.
+        A signature hash type which signs only the current input.
 
     synonyms_shown_in_glossary_capitalize_first_letter:
         - SIGHASH_ANYONECANPAY
@@ -37,7 +36,7 @@ optional:
         - "`sighash_single|sighash_anyonecanpay`"
 
     not_to_be_confused_with_capitalize_first_letter:
-        - SIGHASH_SINGLE (which signs only a single input, like SIGHASH_ANYONECANPAY, but also signs a single output)
+        - SIGHASH_SINGLE (which signs this input, its corresponding output, and other inputs partially)
 
     links_html_or_markdown_style_capitalize_first_letter:
         - "[SIGHASH_ANYONECANPAY](/en/developer-guide#term-sighash-anyonecanpay) --- Bitcoin.org Developer Guide"

_data/glossary/en/sighash-single.yaml

@@ -7,9 +7,10 @@ required:
     title_max_40_characters_no_formatting: SIGHASH_SINGLE
 
     summary_max_255_characters_no_formatting: >
-        Signature hash type which only signs its input and the output
-        with the same index value, allowing modification of other inputs
-        and outputs.
+        Signature hash type that signs the output corresponding to this input
+        (the one with the same index value), this input, and any other inputs
+        partially. Allows modification of other outputs and the sequence number
+        of other inputs.
 
     synonyms_shown_in_glossary_capitalize_first_letter:
         - SIGHASH_SINGLE
@@ -19,7 +20,7 @@ optional:
         - "`SIGHASH_SINGLE`"
 
     not_to_be_confused_with_capitalize_first_letter:
-        - SIGHASH_ANYONECANPAY (a flag to signature hash types that only signs a single input, like SIGHASH_SINGLE, but which doesn't sign any outputs.)
+        - SIGHASH_ANYONECANPAY (a flag to signature hash types that only signs this single input)
 
     links_html_or_markdown_style_capitalize_first_letter:
         - "[`SIGHASH_SINGLE`](/en/developer-guide#term-sighash-single) --- Bitcoin.org Developer Guide"

_includes/guide_transactions.md

@@ -517,12 +517,14 @@ currently available:
   allowing anyone to change where the satoshis are going unless other
   signatures using other signature hash flags protect the outputs.
 
-* [`SIGHASH_SINGLE`][/en/glossary/sighash-none]{:#term-sighash-single}{:.term} signs only this input and only one corresponding
-  output (the output with the same output index number as the input), ensuring
-  nobody can change your part of the transaction but allowing other
-  signers to change their part of the transaction. The corresponding
-  output must exist or the value "1" will be signed, breaking the security
-  scheme.
+* [`SIGHASH_SINGLE`][/en/glossary/sighash-single]{:#term-sighash-single}{:.term}
+  the only output signed is the one corresponding to this input (the output
+  with the same output index number as this input), ensuring nobody can change
+  your part of the transaction but allowing other signers to change their part
+  of the transaction. The corresponding output must exist or the value "1" will
+  be signed, breaking the security scheme. This input, as well as other inputs,
+  are included in the signature. The sequence numbers of other inputs are not
+  included in the signature, and can be updated.
 
 The base types can be modified with the [`SIGHASH_ANYONECANPAY`][/en/glossary/sighash-anyonecanpay]{:#term-sighash-anyonecanpay}{:.term} (anyone can
 pay) flag, creating three new combined types:
@@ -536,9 +538,8 @@ pay) flag, creating three new combined types:
   allows anyone to add or remove other inputs or outputs, so anyone who
   gets a copy of this input can spend it however they'd like.
 
-* `SIGHASH_SINGLE|SIGHASH_ANYONECANPAY` signs only this input and only
-  one corresponding output, but it also allows anyone to add or remove
-  other inputs.
+* `SIGHASH_SINGLE|SIGHASH_ANYONECANPAY` signs this one input and its
+  corresponding output. Allows anyone to add or remove other inputs.
 
 Because each input is signed, a transaction with multiple inputs can
 have multiple signature hash types signing different parts of the transaction. For