[man] fix bogus markup

Summary:
Replace `$(u,...)` with `$(i,...)` since `$(u,...)` doesn't exist.
Cmdliner was emitting a warning at runtime:

  cmdliner error: Unknown cmdliner markup $(u,...) in "Specify classes where the destructor should be ignored when computing liveness. In other words, assignement to variables of these types (or common wrappers around these types such as $(u,unique_ptr<type>)) will count as dead stores when the variables are not read explicitly by the program. (default: $(i,[]))"

Reviewed By: mbouaziz

Differential Revision: D15045004

fbshipit-source-id: e03ece4f7

infer/man/man1/infer-analyze.txt

@@ -360,8 +360,8 @@ CLANG OPTIONS
            Specify classes where the destructor should be ignored when
            computing liveness. In other words, assignement to variables of
            these types (or common wrappers around these types such as
-           $(u,unique_ptr<type>)) will count as dead stores when the
-           variables are not read explicitly by the program. (default: [])
+           unique_ptr<type>) will count as dead stores when the variables are
+           not read explicitly by the program. (default: [])
 
        --ml-buckets ,-separated sequence of { all | cf | arc | narc | cpp |
        unknown_origin }

infer/man/man1/infer-full.txt

@@ -552,9 +552,8 @@ OPTIONS
            Specify classes where the destructor should be ignored when
            computing liveness. In other words, assignement to variables of
            these types (or common wrappers around these types such as
-           $(u,unique_ptr<type>)) will count as dead stores when the
-           variables are not read explicitly by the program. (default: [])       
-    See also infer-analyze(1).
+           unique_ptr<type>) will count as dead stores when the variables are
+           not read explicitly by the program. (default: [])           See also infer-analyze(1).
 
        --liveness-only
            Activates: Enable --liveness and disable all other checkers

infer/man/man1/infer.txt

@@ -552,9 +552,8 @@ OPTIONS
            Specify classes where the destructor should be ignored when
            computing liveness. In other words, assignement to variables of
            these types (or common wrappers around these types such as
-           $(u,unique_ptr<type>)) will count as dead stores when the
-           variables are not read explicitly by the program. (default: [])       
-    See also infer-analyze(1).
+           unique_ptr<type>) will count as dead stores when the variables are
+           not read explicitly by the program. (default: [])           See also infer-analyze(1).
 
        --liveness-only
            Activates: Enable --liveness and disable all other checkers

infer/src/base/Config.ml

@@ -1518,7 +1518,7 @@ and liveness_dangerous_classes =
     ~in_help:InferCommand.[(Analyze, manual_clang)]
     "Specify classes where the destructor should be ignored when computing liveness. In other \
      words, assignement to variables of these types (or common wrappers around these types such \
-     as $(u,unique_ptr<type>)) will count as dead stores when the variables are not read \
+     as $(i,unique_ptr<type>)) will count as dead stores when the variables are not read \
      explicitly by the program."