diagnostics should not contain URLs

Especially if they are not permanent. Remove the URL and update the
wording/quoting to better match existing style.

internal/command/arguments/apply.go

@@ -61,7 +61,7 @@ func ParseApply(args []string) (*Apply, tfdiags.Diagnostics) {
 		diags = diags.Append(tfdiags.Sourceless(
 			tfdiags.Warning,
 			"Deprecated flag: -state",
-			"Use `path` attribute within the `local` backend instead: https://developer.hashicorp.com/terraform/language/v1.10.x/settings/backends/local#path",
+			`Use the "path" attribute within the "local" backend to specify a file for state storage`,
 		))
 	}
 

internal/command/arguments/plan.go

@@ -66,7 +66,7 @@ func ParsePlan(args []string) (*Plan, tfdiags.Diagnostics) {
 		diags = diags.Append(tfdiags.Sourceless(
 			tfdiags.Warning,
 			"Deprecated flag: -state",
-			"Use `path` attribute within the `local` backend instead: https://developer.hashicorp.com/terraform/language/v1.10.x/settings/backends/local#path",
+			`Use the "path" attribute within the "local" backend to specify a file for state storage`,
 		))
 	}
 

internal/command/arguments/refresh.go

@@ -51,7 +51,7 @@ func ParseRefresh(args []string) (*Refresh, tfdiags.Diagnostics) {
 		diags = diags.Append(tfdiags.Sourceless(
 			tfdiags.Warning,
 			"Deprecated flag: -state",
-			"Use `path` attribute within the `local` backend instead: https://developer.hashicorp.com/terraform/language/v1.10.x/settings/backends/local#path",
+			`Use the "path" attribute within the "local" backend to specify a file for state storage`,
 		))
 	}
 

internal/command/testdata/apply/output.jsonlog

@@ -1,5 +1,5 @@
 {"@level":"info","@message":"Terraform 0.15.0-dev","@module":"terraform.ui","terraform":"0.15.0-dev","type":"version","ui":"0.1.0"}
-{"@level":"warn","@message":"Warning: Deprecated flag: -state","@module":"terraform.ui","diagnostic":{"detail":"Use `path` attribute within the `local` backend instead: https://developer.hashicorp.com/terraform/language/v1.10.x/settings/backends/local#path","severity":"warning","summary":"Deprecated flag: -state"},"type":"diagnostic"}
+{"@level":"warn","@message":"Warning: Deprecated flag: -state","@module":"terraform.ui","diagnostic":{"detail":"Use the \"path\" attribute within the \"local\" backend to specify a file for state storage","severity":"warning","summary":"Deprecated flag: -state"},"type":"diagnostic"}
 {"@level":"info","@message":"test_instance.foo: Plan to create","@module":"terraform.ui","change":{"resource":{"addr":"test_instance.foo","module":"","resource":"test_instance.foo","implied_provider":"test","resource_type":"test_instance","resource_name":"foo","resource_key":null},"action":"create"},"type":"planned_change"}
 {"@level":"info","@message":"Plan: 1 to add, 0 to change, 0 to destroy.","@module":"terraform.ui","changes":{"add":1,"import":0,"change":0,"remove":0,"operation":"plan"},"type":"change_summary"}
 {"@level":"info","@message":"test_instance.foo: Creating...","@module":"terraform.ui","hook":{"resource":{"addr":"test_instance.foo","module":"","resource":"test_instance.foo","implied_provider":"test","resource_type":"test_instance","resource_name":"foo","resource_key":null},"action":"create"},"type":"apply_start"}